No, I don't think there's particularly arcane knowledge in optimizing things! That's rather my point. It's not even hard to learn, but the current developer culture is one that treats learning anything outside of their framework as a bogeyman. There are real game developers, with jobs, who are paid many tens of thousands of dollars, who do not even know what an "int" is, because it's all been abstracted away for them and they think that understanding why their game runs like shit is something only Carmack himself could handle. In reality, we could easily produce enough capable programmers to create performant software, we simply choose not to as a culture.